Commercial pilot test of polymer flooding in Daqing oil field has been conducted for nearly two years, this paper summarizes the operating procedures and its initial results. Although this test is far from completion, it is successful according to the analysis of the obtained data which is marked by dramatic decrease of watercut of oil wells, increase of oil production by times, and accordance of the production behaviour with the predicted value on the whole. This test provides excellent prospects for large scale polymer flooding in Daqing oil field.

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